jackson



(No Model.)

J. MQGREGOR & J. L. JACKSON.

STEAM GENERATOR.

No. 573,688. Patented Dec. 22, 1896;

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Jam JV/ Grqgor John Z Jacks 71/ 1 wnms PETERS ca. wow-urns" wksmncUNITED STATES PATENT OFFICE.

JAMES MCGREGOR AND JOHN L. JACKSON, OF SAGINAIV, MICHIGAN; SAID MCGREGORASSIGNOR TO EDGAR D. CHURCH, OF SAME PLACE.

STEA -GENERATOR.

SPECIFICATION formingpart of Letters Patent No. 573,688, dated December22, 1896.

Application filed August 24, 1896. Serial No. 603,772. (No model.)

To aZZ whom it may concern.-

Be it known that we, JAMES MCGREGOR and JOHN L. J AOKSON, citizens ofthe United States, residing at Saginaw, in the county of Saginaw andState of Michigan, have invented certain new and useful Improvements inSteam-Generators, of which the following is a specification, referencebeing had therein to the accompanying drawings.

The invention consists in the construction of a steam-generator andparticularly in the construction of the steam-dome into which thefeed-water is delivered, the steam-dome being provided with asediment-chamber whereby the water is purified before passing into thetubes of the boiler, the sediment being retained in the dome, from whichdome it may be quickly blown out or otherwise removed, all as more fullyhereinafter described.

In the drawings, Figure l is an elevation of a steam-generatorsubstantially of the type shown in United States Patent No. 51%,414, ofAugust 13, 1895, to which the present improvement is applied, thesupporting-walls being shown broken away. Fig. 2 is a longitudinalsection through the steam-dome and its connections with the water-spaceof the boiler. Fig. 3 is a vertical central longitudinal section throughFig. 2. Fig. 4 is a horizontal sectional section through the steamdome.

A is the furnace.

B are two end shells connected by the in clined pipes C in the lowerportions and having the inclined faces D, in which are the tubes E,which connect into a drum F in the middle. Above this drum is thesteam-dome G. The connection from the water-space of the boiler (whichin this construction comprises the shells B, the tubes, and the drum F)is slightly above the bottom of the steamdome. In this construction wehave shown this effected by forming the flange H around the edge of theconnection from the drum F into the steam-dome, which forms a shallowdrum-pan or sediment-chamber I in the bottom of the steam-dome.

J is the feed-pipe leading into the steamdome and discharging into thissedimentchamber. This pipe is arranged, preferably,

as shown in Fig. 4, coming in at one end, ex-

tending around the sides of the sedimentchamber, and discharging at thesame end. The object of this is to prevent an undue cooling of the metalof the dome at one point. We deem it also desirable to discharge thewater away from the connection between the dome and the water-space ofthe boiler, so as to give the greatest possible opportunity for thedeposit of the sediment before the water descends into such water-space.

K are blow-off pipes connecting into the sediment-chamber, and M is askimmer extending through one end of the dome. These pipes are allprovided with suitable controlling-valves. In this construction ofsedimentchamber and feed-pipes we find in practice that the sediment inthe water will nearly all be collected in this sediment chamber or pan,and the water in the tubes of the boiler will thus be largely freed fromits impurities with all the satisfactory results which are known toaccrue from the use of pure water. It is much easier to get at and cleanthe dome, and it is found that a much larger per cent. of the sedimentwill settle quickly if brought into this hottest point in the boilerthan if brought into the lower part, as usual.

\Vhat we claim as our invention is 1. In a steam-generator, asteam-dome, a water-space, a connection from the waterspace of theboiler into the steam-dome communicating with the latter above thebottom thereof, whereby a sedimentchamber is formed in the bottom of thedome, and the water-supply leading into the dome.

2. In a steam-generator, a steam-dome, a water-space, a connection fromthe waterspace of the boilerinto the bottom of the dome, a flange aroundthis connection, forming a sediment-chamber in the bottom of the dome,and the water-inlet pipe into the dome.

3. In a steam-generator, a steam-dome, a water-space, a connection fromthe waterspace of the boiler in the bottom of the dome, a flange aroundthis connection forming a sediment-chamber in the bottom of the dome,the water-inlet pipe entering one end of the dome, passing around anddischarging at the same end, substantially as described.

4. In a steam-generator, a steam-dome provided with an opening in thebottom thereof,

0. In a stean1-generator,-a steam-dome, the water-tubes,a drum withwhich the water- 15 tubes connect, said drum extending into andcommunicating with the steam-dome above the bottom thereof, and afeed-water supply to said steam-dome.

In testimony whereof we affix our signa- 2o tures in presence of twowitnesses.

JAMES MOGREGOR. JOHN L. JACKSON.

Vitnesses:

EDWIN KERSTEN, M. B. OD GHERTY.

